Robocopy mt slow. My testing with /MT was never an improvement. Die Änderungen werden in der Log-Datei protokolliert. Using a recursive loop to dig into the folder structure in the same manner RoboCopy does (which would then be able to be used for filtering/logging/etc if needed) had a average elapsed time of 38,499ms(20 run average), which is still 5x quicker than RoboCopy performed for the same test (granted I wasn't logging file sizes or generating any results data) Hi u/VanillaOMLT. robocopy c:\users\foo d:\backup\users\foo /m /mon:2 /mot:5. I'm attempting to use the /MT switch in Robocopy and it doesn't appear to be working. This is evidenced when the top destination file (which was already completely written before the job interruption) changes timestamp to 1/1/1980 at the robocopy these days has the switch /MT[:n] for Do multi-threaded copies with n threads (default 8) to achieve the same effect only better and not reliant on date ranges, and allows for a single command line, instead of one per thread. /XC excludes existing files with the same timestamp, but different file sizes. We also recommend using the /log option to reduce console output by redirecting logs to a NUL device or to a file. The script itself isn’t doing anything Look at the /MT switch to gain some speed if you're on Windows 7 or later. I also use robocopy whenever possible. Robocopy very slow. /S /E /COPYALL /PURGE /MIR /MT:128 /R:100000 /W:30 It ran fine (although I wouldn't recommend the /r and /w switches as it'll take forever to robocopy src dst sample. e. \ * /copyall /sl /zb /xo /it /mir /r:1 /w:30 /mt:1 /dcopy:T /log:"f:\robocopy_log. This will cause 32 threads to fight for access to the disks, and will slow the copy even further, with the disk's head wasting time by going back and forth over the disk. The /MT:16 command specifies that Robocopy should use 16 threads for copying. mit aktualisiertem Zeitstempel, zulässt. Scenario: Copying files while maintaining their security settings and attributes. Server 2's port is only 1 gig, so this is going to take a considerable amount of time. I am copying SAN > New SAN. WizFile is an awesome (magical) search program. We backup to Seagate 5T USB drives. The first time I ran robocopy I supplied the following switches: Options : . The maximum is 128 threads. Phase 3: RoboCopy. exe, as it is, is great enough for them. With the addition of a few useful commands, Robocopy becomes even more powerful and reliable copying files over a network using the Robocopy /mir command. 91 – 15? I'm using robocopy to copy over the files, and currently just doing some test runs to see how long it takes, before we make the final change over. After 2-3 with Robocopy which looks good at first, I'll try rsync. n must be an integer between 1 and 128. Robocopy comes as part of a set of tools currently known as Windows Server 2003 Resource Kit Tools. DOS robocopy: Having already moved ~1m files yesterday, I ran robocopy src_folder dest_folder *. The defaults are typically there to cover the vast majority of situations including networks that cross major boundaries which add latency or may have slow links. ” What this means is that if you specify /MT without a value, it will by default use 8 thread (/MT is equivalent to /MT:8). ) /MT stands for Multi-Threaded, and tells robocopy to copy multiple files at once. New comments cannot be posted and votes cannot be cast. 1,943 3 3 5 Issues That Hinder Robocopy Sync. Zur Einfachheit You can fool around with the /mt setting in robocopy to find the best number of threads to use. New. /IPG:n :: Inter-Packet Gap (ms), to free bandwidth on slow lines. I would prefer to take server 1 offline for the transfer but that is not an option. In this first example, any . The /TIMFIX or /SECFIX switches are no longer supported. While some can be overcome, doing so involves implementing complex coding and sync set-ups. Robocopy speeds up data copy with its multi-threaded feature, when copying files to another drive — here's how to use it on Windows 10. I’d like it to only copy new or changed files each time. , B. /Z option copies files in restart mode. I am currently using the /Z flag in a Windows Robocopy command with the intention of creating a "restartable" copy job. Tests with Azure Files indicate between 8 and 20 shows balanced performance for an initial copy run. Because of this ROBOCOPY command process, all the files and directories from the source share are copied to the Amazon FSx target share. Once you're ready, review Use an Azure file share with Windows. /sj: Copies junctions (soft-links) to the destination path instead of link targets. In backup mode ( /B ) Robocopy try to read the file exclusively. MT is tricky but in your scenario with USB-attached slow drives and the majority of your data kept in a few really big files, I would leave it off. This will copy all the files, not the subfolders, to the destination RoboCopy does not default to 8 threads, when not using /MT It defaults to 8 threads if you use /MT. Example /MT:4 - Use 4 threads to copy files. If I'm transferring data between them, it's unbearably slow but transfers to/from other systems is fast. Remarks. If you specify /MT, the /IPG switch will have no effect no matter what number you use. sorgt dafür, dass robocopy alle 5 Minuten nachsieht, ob sich mindestens 2 Dateien verändert haben und startet bei Zutreffen dieser Bedingung den Kopierjob. Syntax ROBOCOPY Source_folder Destination_folder [files_to_copy] Ive used robocopy the most, switching between syntax using the following with the same results: robocopy source dest /xo /xn /r:1 /w:1 /e; robocopy source dest /e /zb /r:1 /w:1; And pretty much every derivation of those two lines using those syntax. robocopy c:\hope c:\hope2 /MIR I'm using Robocopy in my Windows 10 PC, to back up to an external 3. 5. 08. I'm a DBA so I never use this particular forum -- feel free to move if in the wrong spot. Der Vorteil von Robocopy ist, dass es bei auftretenden Fehlern den Kopiervorgang nicht abbricht und ihn in Specifies options to be used with the robocopy command. Robocopy Defaults. However, Robocopy supports 1 to 128 threads. ----- (If the reply was helpful please don't forget to upvote Source data: ~500,000 folders (court cases) ~2. Skip to main content Specifies the inter-packet gap to free bandwidth on slow lines. txt /TEE /NFL /NDL /NP. If you specify /MT (for multiple threads), it forces /E (copy empty directories). (default MT:8) I also turned off anti-virus' file protection, otherwise it consumes more CPU but slows down the copy process. /COPY:T replaces the old /TIMFIX, and /COPY:S replaces the old /SECFIX. Is there something wrong with my robocopy script that would cause it to be so slow? I tried it with and without the /MT and it actually seemed to make it slower with it? My Computer essenbe. /SL: copy symbolic links versus the target. exe source dest /MIR /COPY:DATSO /R:0 /W:0 /MT:64 /NP /V /TEE /NFL = 2 Minutes . The drive contains around 800gb of data with over a million files that are 20-80K each. Since I'm working with enterprise hardware, having multiple threads can really help my performance so I'd prefer not to have to remove the switch from the copy operation Copying data to File Storage using Robocopy, Terracopy, or Xcopy is slow in Windows. This is an expected behavior. /MT[:n] “Creates multi-threaded copies with n threads. Default for n is 8. If you do not set a number when using the “/MT” switch, then the default number will be “8,” which means that Robocopy will try to copy eight files at the same time, but Would specifying the /MT option in robocopy give me better or worse performance, when copying a large amount of smaller files (~10-150kB) from an USB attached drive to an internal SATA drive? Should I go all crazy and specify /MT:128? Both drives are regular 5400k spinning hard disks. exe while running different /MT variations and verified myself. The reasoning is I'm also not sure whether priority is the real culprit, or exactly how a change in priority (via START or otherwise) would affect the functioning of a Robocopy command. The first and most important to know is that you run Robocopy in a Robocopy that ships with Windows 7/2008 seems to have a bug. I’d just like to make it faster! neally (Neally) April 24, 2017, 7:45pm I conclude that unless you have used the /sl option, deleting a backup created with Robocopy should be safe. While in Windows Explorer I have writing speeds of 300~400 Skip to main content. /sl: Don't follow symbolic links and instead create a copy of the link. Migrating a server to a new hard disk in a couple weekends so practicing robocopy commands and will begin mirroring it's contents soon. The other thing Mit einem simplen Skript lässt sich eine Datensicherung auf Basis von Robocopy und mit verschiedenen Versionen realisieren. robocopy c:\hope c:\hope2 /e. obocopy (Robust File Copy) is a command-line file copying tool included in Windows operating system beginning from Windows Vista, and available in every new versions of Windows since, including Windows 7, Windows 8, Windows 8. Robocopy is really a one-way file sync solution. I tried a few different options for /mt:# , including 1, 8, 17, 30, and 32. Tage, Wochen, Monate, je nachdem wie oft man es ausführt, zurück gehen. One trick with robocopy is to use the /MT switch which is multithreading. /mt:<n> Creates multi-threaded Inter-Packet Gap (ms), to free bandwidth on slow lines. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted Stack Exchange Network. The value you should use for the '-MT' option depends on the number of available processors or cores on your server. By default Robocopy will only copy a file if the source and destination have different time stamps or different file sizes. Du siehst das Ergebnis von Robocopy timeout /T 50. TowermanT TowermanT. Different way to do this with Robocopy As u/g00nster said : increase Robocopy Multi-threading suing /MT:32 . Robocopy has horrible issues, the summary is totally wrong, the default value for multi-threading is mostly totally wrong/slow for all stuff i copied, resume didn't work. The help text states, “Do multi-threaded copies with n threads (default 8). log robocopy \\sourceserver\share\path C:\Backup /MIR /MT[:n] In this command, n instructs Robocopy to do multi-threaded copies with n threads. chcp 1252 command first, so that the command prompt I'm on Windows 10 and trying to sync my music folder with the one on my LG G5. EDIT: Need to give credit for the original script, as I removed it for my internal files, to Adam Rush who’s also here in the Community. SS64; CMD ; How-to ; ROBOCOPY. It offers a wide range of options, including filtering files, copying attributes and permissions, and handling errors during the copy process. Drag The multithreading in robocopy can dramatically bog down some storage like slow hdds. It was pointless to have /MT set above 1 if only one file was being transferred, so I attempted to simulate the multithreading feature. That is, I don't know exactly what it is about Robocopy that would cause other processes to slow down, when a simple COPY command has no such effect. Español (Spanisch) Einleitung zu Robocopy und dessen Parameter. 000. discussion, windows Multiple passes with robocopy is the best way because after the initial seed you only need to do a /mir /np /mt higher than 8 helps, I do 1 per core. u/Rodion15 Use the /MT switch to do the default 8 threads. Explanation: Using the /MT switch with a value like 32 creates multiple threads, significantly speeding up network transfers. On unreliable or complex infrastructure where interruptions happen MT:2 will ensure that only 2 file copies will get aborted rather than 10 if I had MT:10 (all files copying at the same time). For robocopy you can do MT up to 128 if the box you run it from is server 2012 and 12 cores 24 GB ram or so. Its default value is 8. Further observations: A hard link always yields an empty file. B. Visit Stack Exchange The most important switch to focus on in the above command is /MT, which is the switch that enables Robocopy to copy files in multi-threaded mode. i. /mt:<n> Creates multi-threaded copies with n threads. auf der microsoft seite steht auch nichts über /mt :/ @OhNoIKilledMyHD I have a customer that we are doing off site copy of their data to a server that has all the same software installed. Asynchronous Copying (Robocopy /MT) By default, robocopy only processes one file at a time. Feeding in individual files from an array into Robocopy is unfeasibly slow, as Robocopy instances were being started sequentially for each file, so I tried to speed up this process in 2 ways. To combat this, I use 3 methods to capture all the errors. – I am using Robocopy to periodically copy data media data (mp4 video files) from Local drive to network drive. ” Die timestamps werden automatisch in Deinem Beispiel mit übertragen, welche Robocopy vergleicht und bei einem neueren timestamp die Datei kopiert. rcj" Share. Somehow, its search is just as Antec Vortex 360 AIO, Thermaltake Versa H25 TG, Samsung 4K curved 49" TV, 23" secondary, Mountain Everest Max. I tested this. /MT:n - Multithread transfer with n threads. Mobile SFF rig: i9-9900K, Noctua NH-L9i, Asrock Z390 Phantom ITX-AC, 32GB However, 96 seems a bit over the top for me Using a number as low as /MT:16 eats quite a bit of CPU in my experience. If You have to avoid that the robocopy jobfile is on a network share. The following RoboCopy command will copy only the differences (updated files and folders) from your source storage to your Azure file share. BUT with this option speed is not good. If one server is on a slow network (or file transfer Robocopy supports paths that are larger than 256 characters by default, Robocopy even provides a flag that lets you turn OFF support for long path names (flag: /256). The issue I’m having is that robocopy copies all files each time (which takes around 12 hours). Ein besonderes Feature von robocopy Real run: robocopy Q: G: /E /COPYALL /R:20 /W:15 /MT /NP /A-:SH /Z /V /TEE /LOG+:VMRobCp. log just to shift the last of what was in the first directory. Copying Files with Security Attributes . Example 13: Log only errors into a text file: I have a powershell script that runs the following command: robocopy \\\\backupdevice\\Backups B:\\BackupCopy /mir /ipg:5 /xf *. exe source dest /MIR /COPY:DATSO /R:0 /W:0 /MT:64 /NP /V /TEE = 1 Hour ROBOCOPY. If you have scripts that use these switches you must edit them to use /COPY: instead. discussion, windows If /MT is NA for a SINGLE, large file transfer. log /NP /NDL \\Robin\g\HyperV-Exported-Systems \\Eagle\g\HyperV-Exported-Systems For several months I have been backing up the Hyper-V systems from the Robin system to the Eagle system and was getting an average speed of 3190 MB/s Recently I started booting the Eagle system to running Windows Server PowerShell - Get-ChildItem too slow while searching for files on a Network Share Hot Network Questions Is the black fluidic substance surrounding stolen armor in The Predator (2018) Chemical A0-3959X. By default it is 8 threads but you can set it to /MT:16 or higher. Share Sort by: Best. It's nice if you're copying large files over a slow connection (like WAN), but if you're on a fast connection (like internal drives) it slows the whole thing down like crazy. The following will move all the files. AKTUALISIERT 02. ) below Perhaps the most important switch to pay attention to is /MT, an option that enables Robocopy to copy files in multithreaded mode. Dort kann man übrigens auch Standardverzeichnisse für Quelle und Ziel angeben, was man aber aufgrund möglicher unerwünschter Nebeneffekte lieber bleiben lassen sollte. If you plan on using robocopy to sync files on your computers, there are a few limitations you should be aware of. Explanation: The /COPYALL switch I'm trying to figure out how to speed up my Robocopy file copies. Mit dessen Hilfe kann man schnelle und inkrementelle Kopier-Vorgänge tätigen oder auch Backups erstellen mit dem Schalter MIR. Verzeichnisse synchronisieren . I kicked off 3 file transfers all at the same time from The > null does not work in the quotes. As a side effect, it won't show progress in the console, you need to look at the log file or Reference article for the robocopy command, which copies file data from one location to another. usb; robocopy; multi-threading ; Share. robocopy c:\hope c:\hope2 /MIR I would like to know the reason that robocopy command is slower than copyFile api. For When I mount an Azure Fileshare from my Azure DevOps pipeline and copy files to the file share via robocopy, this is with 80 Megabytes per minute (12 MBit/s) very slow: Total Cop If you do not use /MT at all then robocopy is only using one thread. The Robocopy hat viele Syntaxen. The /MT option allows you to specify the number of threads robocopy will use to copy files. txt file would be copied from the hope directory into the hope2 directory. NOTE: In my example above, Robocopy will not copy the directory "data1", only its contents Ever thought how useful it would be to be able to throttle Robocopy to prevent it from hogging all your bandwidth when copying over a network, particularly a slow one?. Commandline = robocopy. In dieser Anleitung zeige ich euch, wie ihr unter Windows einen Ordner auf eine externe Festplatte* spiegeln könnt. Sample 4 suppresses all Therefore, you may experience slow transfer if you're migrating a large number of small files. Server 1 is live in a prod environment. However, you can force robocopy to copy more files than at once by using the /MT option. The maximum is 128. txt /is # copy if attributes are equal robocopy src dst sample. /PF :: check run hours on a Per File (not per pass) basis. Robocopy ist mit 72 Parametern ein sehr mächtiges Programm in der Kommandozeile für Windows Betriebssysteme. The default value for N is 8. The copy preserves file and folder NTFS ACLs, attributes, timestamps, owner information, and Learn some Robocopy options that you can use in data migration, syncing folders, and copying even large files. Edit: I found that this must be a super old version executing. Add /MT and you'll really be flying. Other than the docs imply, it does not 5 Issues That Hinder Robocopy Sync. You are using /MT:32 for Multi-Threaded, so telling robocopy to copy 32 files at once. Had a similar case, running 2 Robocopy instances. Share. Some antivirus tools may also impose delays writing or reading Robocopy is a command-line directory/file replication command. txt /tee /np /ndl /fp It’s supposed to copy the files from the network-based backup device to the local storage location as a secondary backup. robocopy c:\hope c:\hope2. The default MT value is 8 if you don’t specify it. (We also have various fuller-featured data transfer tools, but for a user experience directly comparable to robocopy, but with faster speed, AzCopy is the way to go). If source file is not ready yet At least add the /MT switch. n must be at least 1 and not greater The most important switch to focus on in the above command is /MT, which is the switch that enables Robocopy to copy files in multi-threaded mode. Dabei läuft das Programm jedoch in einer Endlosschleife. Introduced in Windows Server 2008 R2, the /mt option of Robocopy can significantly improve speed on remote file transfers by using multiple threads when copying multiple small files. Option /xjd skips links to directories. /E /V /R:1 /W:1 /MT:128 /ZB /SEC /LOG:C:\rclog. I've run the tests (A. robocopy c:\hope c:\hope2 Due to the CPUs' 4 cores and hyperthreading I was expecting, that the Robocopy switch /MT:8 would work best, and that more than 8 threads would be overkill due to not beneficiary thread management. Depending on the version of robocopy you have, there is a multithreaded copy option, /MT:16, where the number is the number of individual threads to run. Share The command I use is :robocopy "E:\source" "R:\mapped freenas share" /XJD /R:0 /XA:SH /E /ZB /XO /COPY:DAT /MT:8 I also tried binding SMB to the ip address that is the 10 gbit NIC. This is because each thread requires CPU resources, ROBOCOPY. Although Robocopy is available for free with the download Windows Resource Kit wenn ich die log datei öffne steht bei options aber /MT:30, obwohl ich robocopy ohne diesen parameter ausgeführt habe. Skips file copy if last write time, file name, and file size match Copies file if last write time, file name, or file sizes don't match As indicated by @mklement0, the implied The /MT option indicates to run it multi-threaded which will be running 8 instances (the default) of Robocopy, copying more than one file at a time. If you enable multithreading, your drives are going to have to service two IO streams which isn't too bad for a lot of small files (lots of small files in NTFS behaves pretty similarly whether you There are also a number of PowerShell projects that were inspired by Robocopy, such as the xRobocopy module, and RoboPowerCopy. It's also generally not useful information. txt" /tee /v /x /xf "thumbs. RoboCopy. Alle uns bekannten Robocopy Parameter Robocopy eignet sich sehr gut um Ordner zu synchronisieren und kann somit auch für automatische Backups genutzt werden. use (add) /MT:96 MT = Multi-threaded (at 96 threads) Spiceworks Community Robocopy? Is it supposed to be this slow? Robocopy very slow. Follow edited Jun 7, 2019 at 2:20. This causes it to run much more By default Robocopy is single threaded, so one file at a time, and it has to calculate permissions for all those small files. 000 times". But when I tried out robocopy with any of the following commands, Task-Manager reported only about 30 MBit/s of network traffic and the copy took very long: Grundlagen zu robocopy. exit Mit REM sind In diesem Beispiel nimmt Robocopy eine Sicherung nach 25 Minuten vor, wenn mindestens eine Änderung erfolgt ist. another way, it to use not only one Robocopy Instance but multi. Is there a way to fix adjust something? Please advice. bat file) to backup files. For better my ditty - Using RoboCopy threading [post #10] - TenForums - - I use /MT:16 for a slow & simple tablet. here is what I observed. but disk performance issue is not solved. Den Parameter “T” kann man bei “/COPY:” auch weglassen, da mit dem Parameter “D” der timestamp mitkopiert Robocopy = v XP027. robocopy C:\source D:\destination /COPYALL. Da es aber VMs mit fester Größe sind, ändert sich das Datum/Größe nicht. Typically, when you copy files from File Explorer, you only copy one file at a time. If you do not set a number when using the “/MT” switch, then the default number will be “8,” which means that Robocopy will try to copy eight files at the same time, but For the actual backup I wanted to use robocopy which schould be able to be scheduled and also detect whether a copy is even necessary etc. 1. By default Robocopy assumes /COPY:DAT, and will copy file data, attributes, and timestamps. My favorite feature of RoboCopy is the /MT option to improve performance of copy/move actions. Basic version is free (for home use I guess). Dafür erstelle ich ein Batchscript, welches bei Bedarf per Doppelklick gestartet werden kann. But for transferring a single file such as a multi-GB video, would Working for the DoD and having notoriously slow network speeds robocopy /z (the ability to resume failed transfers) is a god send! Reply reply The /MT switch will turn on multithreaded copy. - - I had to use /MT:1 for the local SD card I had about five or so years ago and have not bothered experimenting with higher numbers for my new SD card. Unabhängig davon, welches Tool Administratoren einsetzen, ist eine Many small files the /MT can help use "more" bandwidth overall (most of the time transferring many small files isn't actually transferring the files) but too many threads can saturated disk IOPS, CPU threads, or some other bottleneck, and slow it down even more. Earlier I was able to fix this by sending a . And always use /R and /W because the robocopy defaults essentially mean "retry after 30 seconds and repeat that 1. Allerdings überträgt Robocopy standardmäßig alles auf einem bestimmten Pfad, was Robocopy slower than cut and paste. /MT[:N] Makes multi-threaded copies with a specified Robocopy's speed depends on some options. Below is the command line I’m using: robocopy d:\\ \\samba\\share\\ (NOTE: the /Z switch sometimes slows down the copy speed, so if you don’t need it, don’t use it, especially if you feel like your Robocopy job is taking longer than it should. With these two tweaks I got my sync speed up to 300MB/s running a robocopy with /MT switch. Last week I wanted to make sure my network could handle moving a multi-terabyte file across it. txt /is /it # copy irrespective of attributes This answer on Super User has a good explanation of what kind of files the selection parameters match. The default value for n is 8. After adding /MT:32, it runs a lot faster than without this option. 1, Windows 10 and their server variants. Wie schnell passiert es, dass die Festplatte* defekt ist, oder man aus Versehen wichtige Daten gelöscht hat. While a high thread count helps saturate the available bandwidth, it doesn't mean your migration will always be faster with more threads. Backup nach 1 Also, this may not actually help, but I would remove the /ZB flag. Use it to backup, move or mirror a directory of files. Robocopy Examples Robocopy has many command line options and it can be overwhelming to know which commands to use. It is not an easy tool to use. Products. u/dragonmc is correct. From my experiences: If it is all large backups /MT might Robocopy has many features, and in the command shown in this guide, we’re using the following switches to make copy reliable and fast. I'm doing an initial sync of about 25TB from fs1 to fs2 with robocopy: RoboCopy also allows you to preserve all of the associated file information, including date and time stamps, security access control lists (ACLs) and more, which is missing from normal file copy operations. Q&A [deleted] • Feeding in individual files from an array into Robocopy is unfeasibly slow, as Robocopy instances were being started sequentially for each file, so I tried to speed up this process in 2 ways. My Disk/Ethernet reach their capacity before CPU reaches its own one. The first file, depending on its size, may be a little slow but it will pick up speed as it goes along. 4 or later. Use /MT as Adam suggested. Windows. Took about 12 hours to transfer a little less than 4TB using a simple copy'n'paste via SMB network shares (both Win10 21H2 PCs w/ Gigabit LAN). I list the fourth test series' data here (duration in Grundlagen zu robocopy. My network is two Windows 10 PCs with Gigabit network cards, connected via a Gigabit switch. Best. I think the main slow down is it just having to iterate through each and every sub folder and sub folder and sub folder and file upon file. robocopy %Quelle% %Ziel% /MAXAGE:2 echo. Would specifying the /MT option in robocopy give me better or worse performance, when copying a large amount of smaller files (~10-150kB) from an USB attached drive to an internal SATA drive? Shoul Skip to main content. For N, a value of 2-4 times the number of cores should do on a Don't forget the /MT:nn switch to specify the number of threads. Windows 11 Pro New 03 May 2016 #266 robocopy <source> <destination> /e /mir /np /tee /mt:10 /log: 6 Robocopy. Regarding the '-MT' option in Robocopy, it is used to enable multi-threaded copying, which can significantly improve performance. Every monthend drive gets saved indefinitely. If you do not set a number next to the /MT switch, the default number will be 8, which means that Robocopy will try to copy eight files simultaneously. No change. Mount the Windows Server Message Block (SMB) share as a Common Internet File System (CIFS) share and use a copy tool such as PARCP or FPSYNC to transfer data. Then mount the Azure file share you want to start the RoboCopy for. Larger buffer sizes up to 256K will give a slight performance increase. Robocopy is really a one-way file transfer solution In den aktuellen Betriebssystem-Versionen ab Windows 8/2012 sollten Administratoren aber robocopy mit der Option /mt verwenden. If you do not set a number when using the “/MT” switch, then the default number will be “8,” which means that Robocopy will try to copy eight files at the same time, but Als einziges hier besprochenes Tool verlangt SH-Robocopy GUI, dass in einem Options-Dialog der Pfad zu Robocopy eingegeben wird, andernfalls lässt sich kein Kopiervorgang starten. That way you do not affect other employees during the robocopy runs. Perhaps the most important switch to pay attention to is /MT, an option that enables Robocopy to copy files in multithreaded mode. The general guideline is to use a value equal to or slightly less than the number of processors/cores. n must be at least 1 and not greater than 128. Can i use any other parameters in robocopy to make it faster. Subsequent /MIR runs are progressively affected Robocopy: 15 TB over slow 1 gig network . Aber wenn Sie mit Robocopy komplettes Laufwerk auf anderes Laufwerk kopieren möchten, haben Sie zwei Syntaxen zur Auswahl, eine ist die „robocopy copyall“-Syntax und die andere ist die „robocopy move“-Syntax. However, 96 seems a bit over the top for me 🙂 Using a number as low as /MT:16 eats quite a bit of CPU in my experience. The script has to search through SO MANY folders, and check ages of EVERYTHING that’s there. txt /it # copy if attributes differ robocopy src dst sample. (not per pass) basis. MS Technet has a GUI for robocopy as well - useful to create /RH:hhmm-hhmm :: Run Hours - times when new copies may be started. Free tool from MS and is included in Vista/Windows 2008. I have tried from different machines and different sets of data at differentt times of the day but seem to experience the same behaviour Robocopy wird dabei sozusagen in Schleife ausgeführt bis das STRG+C gedrückt wird. Please attent to the filename of the job and the file ending. This new job was copying a different shared folder of similar size from the same source server but to a different target VM. Removed the /ZB and, since this, I use /B only. It took 27 minutes to move ~12k files. I'm looking through the Robocopy ist ein Kommandozeilen-Tool aus dem Hause Microsoft zum Kopieren von Verzeichnissen. Genau deswegen ist es unerlässlich, dass man eins vernünftige Datensicherung anlegt. ROBOCOPY /MT:<n> In the above command, n is an integer, whose value lies between 1 and 128. In the case of slow USB2 copy, Multi-Threaded is not recommended. 5-3 million documents Source drives is replicated x2 with RAID Copying to NAS over GB ethernet Initial un-tuned copy was set to take ~2 weeks (after switching to Robocopy - before, it was painful just to do an ls) Final copy took ~24 hours Monitoring: Initially I saw 20-40 I have a server that I am working on that is using Windows 2008 SP2 Enterprise and I have found that the installed version of Robocopy is missing the MT (multithread) switch. exe source target /l /e /zb ----- ROBOCOPY :: Robust File Copy for Windows ----- Started : Thu May 01 09:08:20 2014 Source : C:\source\ Dest If I have 10 files to copy where each takes few hours setting MT:2 allows me to have only 2 file copy threads to be active at a time. I am overwhelmed by the ROBOCOPY documentation. I've tried, after reading around, what seems like all variations of the below with " Das Windows-Bordmittel Robocopy eignet sich nicht nur hervorragend zum Kopieren und Synchronisieren von Dateien und Ordnern, sondern auch zum Verschieben. Robocopy ist ein leistungsstarkes Befehlszeilentool für Windows, mit dem Sie Dateien und Ordner von einem Speicherort zu einem anderen synchronisieren können. Top. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. /MT[:n] Do multi-threaded copies with n threads (default 8). g. Alright, I'm absolutely confused. Here’s one of my current Robocopy files:::Copy selected files from A: and B: to X: using Robocopy ::20130624 Added /MT switch ::20130404 Added delete for older Veeam files. However, it seemed to be taking longer than it should to transfer that to a portable HD, and also the text was displaying and scrolling much slower than normal. We backup every night, using the Monday drive the following Monday, etc. It sees the > null as the batch filename. Use Microsoft Robocopy GUI. Using Robo Copy I have it set to copy new data and remove any thing that has been deleted from the Production server from the off-site server. However, it’s important to keep in mind that using too many threads can actually slow down the process. Windows 11 Pro New 03 May 2016 #266 robocopy <source> <destination> /e /mir /np /tee /mt:10 /log: robocopy c:\Sourcepath c:\Destpath /E /XC /XN /XO To elaborate (using Hydrargyrum, HailGallaxar and Andy Schmidt answers): /E makes Robocopy recursively copy subdirectories, including empty ones. /MT[:N] uses multithreading and can speed up transfers of many small files. /MT:16 — This command copies files in multithreaded mode — i. /MOVE :: Verschiebt Dateien UND I have tried a single robocopy instance with higher /mt flags and that didnt help, I tried multiple robocopy instances with lower /mt flags and that didnt help. In meinem Beispiel ROBOCOPY /MT:1 /MIR /R:0 /W:0 /LOG:G:\files. (or, try the opposite at /mt:16 ). How can I make the best use of /MT option in robocopy. Using multiple threads can significantly speed up the file copying process. /MT Creates multi-threaded copies with N threads. Just take a look at the github repo and the issue, it's far from a good product. : robocopy oldFS:\Users\xxx \\NewFS-IP\Users\yyy /mir /copyall /dcopy:T /R:2 /W:2 /MT:32 /log:c:\xxx. All Robocopy parameters were the same except for the destination path and the absence of the /MT switch. How many files are in the pictures folder? The more files, the more the system will churn. Mit seinen etlichen Kommandozeilenparametern ist es sehr vielfältig anpassbar und unterstützt sogar inkrementelles Sichern von Verzeichnissen. The cause for this difference is the processing power needed to walk through a namespace. Skips file copy if last write time, file name, and file size match Copies file if last write time, file name, or file sizes don't match As indicated by @mklement0, the implied Hallo, ich will per Batch Script mit Robocopy einen Ordner mit VMs sichern. That copies at about 5-10MB/s. Robocopy is a command-line tool in Windows that allows users to efficiently copy or synchronize files and directories. Initial transfer was at 800MB/s, without these tweaks I got 60MB/s. 2023: Unter Windows 11 (oder 10) ist Robocopy (Robust File Copy) ein leistungsstarkes Dateiverwaltungs-Befehlszeilentool mit vielen Optionen, um Dateien und Ordner schneller und zuverlässiger als der Datei-Explorer an einen anderen Speicherort zu übertragen. EDIT: I ran a second RoboCopy job that is similar to the original (below), but not technically exactly the same. does any other option enable (the most) lightning file transfer (backup mode or any other) same q applies to copy/xcopy I guess. Before we deep dive into Robocopy and look into all the options, let’s first start with the basics. Ich werde Ihnen Beispiele für die Verwendung dieser Robocopy-Syntaxen zur Verfügung stellen. Backup nach 1 Robocopy examples robocopy c:\hope c:\hope2 *. 0 port. The following options will change the performance of robocopy: /J : Copy using unbuffered I/O (recommended for large files). Copies the symlink versus the actual file the symlink points to. When you need to move files from one location to another, then you can use the /mov parameter in Robocopy. If there are lots of small files, more threads than the default usually helps. I dunno. For reference the data being copied is a mix of everything from small doc/docx files to large 20-50GB project files for various software In diesem Beispiel nimmt Robocopy eine Sicherung nach 25 Minuten vor, wenn mindestens eine Änderung erfolgt ist. Stack Exchange Network. By default, Robocopy uses 8 threads Robocopy is a very powerful tool and specifically, the Robocopy /mir command allows for robust and useful file and folder mirroring across folders and network shares. log. I spent years using Windows as my "home server" and lots of backups and file manipulations using robocopy. Posts : 26,990. Well you can, using the /IPG (Inter packet Gap) デフォルトでは robocopy /MT:8 となっています。これは8 スレッドを使う、という意味ですが、 CPU が 8 コア以上ではないとあまり効率的ではありません 。これを適切な値に設定すれば高速化が可能になります。 経 Copies NTFS Permissions / Auditing Information / Owner Information: EMCopy and RoboCopy will both do this, but again, EMCopy just mops the floor with RoboCopy when running it side by side. Though the MT switch is not available on Windows 2003. I want to do an incremental backup of my local files to the network drive (M). Improve this Home \ Windows \ Windows 10 Ein umfassender Leitfaden zu Robocopy. In this post, we will take a look at how to ues robocopy to copy, mirror, purge Files and Folders. In der Hilfe (“robocopy /?”) findet man die entsprechenden Parameter: /MOV :: Verschiebt Dateien (löscht Dateien nach dem Kopieren an der Quelle). If you did use the /sl option however, absolute symbolic links could get you into trouble, e. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, Perhaps the most important switch to pay attention to is /MT, an option that enables Robocopy to copy files in multithreaded mode. But if I make a script with 30,000 individual robocopy commands (one for each folder) and run them sequentially, it runs very fast. Robocopy is really a one-way file transfer solution By default, Robocopy skips copying existing files if the specific metadata of the files match then those files will be skipped from the "file" copy operation (/COPY:DAT). . This guide dives deep into using Robocopy’s multithreading capabilities, making it easy to understand and master this efficient file transfer technique. If most of the files are bigger they will not be helped much by adjusting For this scenario, instead of using robocopy we recommend using AzCopy v10. I have read that Robocopy does not replace existing files (even if different) in the destination. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog The ROBOCOPY command is a flexible file-transfer utility with multiple options to control the data transfer process. 11 1 1 bronze badge. 1) If you create a log file using the built-in /log:file or /log+:file, not all errors end up in the log. Approx 200GB data with 8 million files. , C. There are virtually no low-level copy tools out there that use multi-threading. Vor allem auch bei großen Verzeichnissen kann man nur neue oder geänderte Dateien in das Backup einschließen, was den Vorgang erheblich R. If file Data is copied, then file Timestamps are also copied. robocopy multiple threads Further | Robocopy Multithreaded. You must have Reporting every file to the terminal is extremely slow, but logging every file to a file will still slow things down quite a bit. Unlike robocopy, it's optimized for transferring over long distances to cloud storage. In By default, Robocopy skips copying existing files if the specific metadata of the files match then those files will be skipped from the "file" copy operation (/COPY:DAT). Just trying to see what all I can do to try and speed this up, even just the smallest amount. – Robocopy is recommended. REM MAXAGE:2 bestimmt, dass nur Dateien, die in den letzten 2 Tagen erstellt oder verändert wurden kopiert werden. Is that true that robocopying the data rather than cutting and pasting is a much slower process (both preserve the metadata). Every Friday’s backup gets saved for a month and then reused. db" /l. discussion, windows-7, file-sharing. If one of the robocopy flags makes it run too slow or doesn't copy the files you expect, read through the Is there something wrong with my robocopy script that would cause it to be so slow? I tried it with and without the /MT and it actually seemed to make it slower with it? My Computer essenbe. Try with /mt:1 or 2 and see if the speed goes up. Add a comment | 0 I have found that you need a space after the last slash when you put a path In quotes for the source and or destination. I havent used other syntax such as /MIR and when I try to multithread, the job never starts I have a folder with ~30,000 folders and ~3000 files in each folder. I tried /MT:8, /MT:16, /MT:32 and /MT:128 but all gave me similar results. Open comment sort options. txt. We have found over time that the backups always take I am using Robocopy from Source to Destination. I suspect it is slow compared to just a drag-and robocopy /e "C:\GOG Games\BATTLETECH" "F:\gog\BATTLETECH" /XO /xj /FFT /z /XA:H /r:10 /w:15. The phone's set to file transfer mode, so I can navigate to it in Windows Explorer through This PC > G5 > Internal storage. I found that 8 (the default) On Windows 11, use Robocopy with "MT" option to speed up file transfer and "Compress" to enable SMB compression for fastest network copying. Everything is fine as long as the paths (to folders to backup) do not contain letters like ö, ü, ä which whoever is inevitable as this is a German environment. I want it to run as quickly as possible, with no log file and with as . Robocopy looks like my best option. This is evidenced when the top destination file (which was already completely written before the job interruption) changes timestamp to 1/1/1980 at the Please note that the IPG feature in Robocopy is incompatible with the MT (multithreading) option. So hat man nicht nur eine Kopie-Sicherung, sondern kann mehrere Versionen wie z. When network goes down while copying, it resume next time. /mir: Mirrors a directory tree (equivalent to /e plus /purge). Old. Setting /MT too high can cause extreme latency issues with windows and your storage subsystem. 2) Robocopy - CLI based, useful when scripting. when using the del command. It reminds me of using the SPEED command in BASIC (and I apologize if that was only in I have also found some problems with ROBOCOPY and the reporting of errors. In the above example, all files and folders (including empty ones) will be copied from the hope directory to the hope2 directory. Take a look at RoboPowerCopy: A PowerShell "clone" of the famous "ROBOCOPY" tool. In the above example, the robocopy command would copy all files (not directories) in the hope directory to the hope2 directory. If you're not using /MT, then just keep increasing the IPG until it no longer takes all the bandwidth. Robust File and Folder Copy. Improve this answer. The higher you go, the higher it leans on CPU. Nicht geeignet ist er wiederum um jede Änderung in ein eigenes Ziel zu sichern, da Robocopy keine dynamische Änderung des Ziels, z. Glen Knight. Below are several use cases of the robocopy command. /NOOFFLOAD : Copy files without using the Using robocopy on the new server with the command line robocopy /S /ZB /MOVE /J /DCOPY:A /V /FP \\oldserver\shared\folder X:\folder. For people who like to work with the command line, RoboCopy. The commandline should be: robocopy /JOB:"driveletter:\-yourjobname-. Question I need to move roughly 15 TB of data from server 1 to server 2. If I run robocopy on the whole folder it runs very slow and constantly hits the pagefile. You can use /MT like so: If you are on an RFC1149 compliant network then you may need to set timeouts significantly longer than the defaults. ::20130326 Changed source for Exchange This way the compressed file was still in progress when robocopy /zb started (was using restartable mode due to no issues to use it), the compressed file still in progress for 15 more minutes. , when syncing large files and/or syncing to multiple endpoints) and can create bottlenecks. 5" hard drive mounted on a docking station (SATA to USB) on a USB 3. If you want, you can increase its value using /MT switch. It says specifically; The default value for n is 8 Ie. 2) Additionally not all errors get reported to ERRORLEVEL. In fact I've adapted the funcionality of "robocopy" in PowerShell to provide you and myself a "robust file copy" tool. Matthew . So, there aren’t a whole lot of files being moved at once. However, 96 seems a bit over the top for me Using a number as low as /MT:16 eats quite a bit of CPU in my experience. That alone will in many cases double or triple the speed, especially when dealing with a lot of relatively small files. Maybe during normal work hours you use fewer threads than at night. Robocopy copies files and folders in multi-threaded operation by default, with 8 threads in one go. If you do NOT specify /MT, then by default there will be only one thread. Verzichten Sie auf eine ausdrückliche Zeitangabe, nutzt Robocopy für die automatische Verzeichnisüberprüfung eine Default-Einstellung (Überprüfung und ggf. ROBOCOPY source destination /MIR /MT:32 /MT:n: Allows Robocopy to run multithreaded. From experience it works much, much better with UNC-described network locations as mapped drive-letters force serialization that undoes the multithreading. As a side effect, it won't I'm using Robocopy in my Windows 10 PC, to back up to an external 3. I had a set of nearly 3 million small files (by small I mean a few bytes to a couple MB) that I tried to move with /MT of varying number of threads. Use the /MT switch to do the default 8 threads. Where have you read this? From my experience robocopy & xcopy are significantly faster than Windiws Explorer. Step 1: robocopy c:\Source C:\Destination /MIR Now when I execute second command in step, anything before January 1, 2019 should be removed from destination with /MIR parameter, however this is not occuring (files after Jan 2019, still remain in folder instead of being deleted On my Windows 10 machine I am trying to run a "robocopy" command (from a . Follow answered Sep 6, 2021 at 14:42. Denn mit dem Schalter /MIR kann man die gewünschten Dateien rekursiv kopieren. 128 will blow things up. 3) Lastly, successful copy may be reported as an ERRORLEVEL 1. Whenever you want to copy one or more files and not a complete directory the file must be specified after the destination directory. Viele nutzen das Windows interne Kopier-Tool Robocopy für Backup Aufgaben. /r:5 default is 1M, which sucks if there is an issue, this cuts it down issues, especially since nothing should be locked by users. Tried with different thread options 8,16,32 etc. I would like to avoid having to get third party software (commercial) if possible and get robocopy working. Removing /TEE and just relying on the log file may help as well. Options for this use-case /purge: Deletes destination files and directories that no longer exist in the source. /w:2 default is 30, this just speeds up time between retries. When Robocopy is executing copy command, local disk access is very slow and becoming almost unusable to open it. Cleaning up my path and being sure windows\system32 was first in the chain brought things back to normal. This can hugely increase throughput when where are a lot of small files. Check out the associated written guide!https:/ Robocopy was available in the Windows NT and Windows 2000 resource kits and all the Windows operating systems after Vista (7, 8, and 10). Removing /TEE and just Today, I learned that you can use the /mt switch with robocopy to make file transfers faster. [I'm not sure the /MT option is a good idea, robocopy is mult-ithreaded for some reason. I would definitely prefer: 1) Teracopy - GUI based, replaces the default Windows copy/move UI and adds itself to context menu. Learn how to use Robocopy to sync file servers and the commands you can use to control how the sync is performed. log robocopy oldFS:\Users\yyy \\NewFS-IP\Users\yyy /mir /copyall robocopy source destination /np /nfl /ndl /mt:2 133 robocopy source destination /np /nfl /ndl /mt:4 84 robocopy Windows 'drag-n-drop' used to be notoriously slow, but I have a hunch it now uses RoboCopy under the covers. I need to throttle the backup to not use the full 1Gb/s I'm trying to use robocopy with a variable as both the source and destination, different one for each, but I just can't get the right syntax. One is our primary fileserver(fs1), the other our DFS replication point(fs2). I’m using robocopy to copy files to a samba share. 10: 556: October 3, 2017 Robocopy? Is it supposed to Robocopy is a build in command line program that is fantastic at copying files quickly and bypasses many of the downsides of the standard copy process of windows. Somit erkennt Robocopy diese nicht als neu You can get very close to Robocopy's speed with a simple C# program that does asynchronous reads and writes using a standard FileStream with a 64K buffer. /S — Copy subdirectories, but not In summary, to achieve the fastest copying of new and modified files using Robocopy, open multiple command windows and run Robocopy for each folder The Basics. It specifies the number of threads to use for copying files. Sometimes there’s no speed difference, and sometimes it can be dramatic. Here is a test I did, just for this post, EMCopy vs. The hard code which I can get to work fine is: robocopy C:\Users\me\Documents\a C:\Users\me\Documents\b But I can't get it to work with variables. Archived post. THANKS!!! The /MT (multithreaded) option is frequently misunderstood. Probably. Understanding the /MT Switch: The key to Robocopy’s multithreading is the /MT switch. robocopy “D:\\apps\\Program"offsite server\\D$\\apps\\Program” /mir /r:2 /w:1 /zb /log:c:\\D-Program. However, when the copy command is re-executed after an interruption, the copy job restarts at the beginning. After downloading and installing, I recreated the scenario in my question and gave it a go: C:\>robocopy. Visit Stack Exchange I'm using Robocopy within a PowerShell script to backup my main SSD to another SSD, but I'm having problems with the file transfer speed. Windows copy utilities scan a directory for every batch of writes during a copy. The robocopy no output worked!!! Here is the new batch file: robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np c:\EnvBackup c:\offsite_backup\EnvBackup robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np c:\shares c:\offsite_backup\shares robocopy /mir /B /r:1 /nfl /ndl /njh /njs /nc /ns /np robocopy \\Server\Share D:\backup /MT:32. The /mir option is equivalent to the /e plus /purge options with one small difference in behavior: With the /e plus /purge options, if the Robocopy's speed depends on some options. I suspect it is slow compared to just a drag This is literally just a normal robocopy using the /mt flag for 16 threads instead of the default 8, and simplified logging options for increased performance. REM timeout wartet 50 Sekunden auf Nutzereingabe. Robocopy kopiert vom Verzeichnis Quelle nach Ziel. EX:: Single thread mode: robocopy <source> <destination> default 8 thread mode: robocopy <source> <destination> /MT Custom multithread mode: If I use the /mt switch, whether I put a number after it or not, and whatever number I use if I do, robocopy will get invoked, and displays the robocopy statement in the batch file for maybe 5-10 seconds and then executes (that's when I finally see text going by to indicate a file transfer). Geeigent ist dieser Modus um möglichst zeitnah Änderungen an eine andere Stelle zu spiegeln. I use 32 or 64 which is great if you have a lot of small files like pictures. I know robocopy is faster than the normal copy command for transferring many files over a network because of its multithreading. As a side effect, it won't show progress in the console, you need to look at the log file or Task Manager for the transfer rate. Hi all, I have these two file servers that I cannot for the life of me figure out. tmp /log+:c:\\backupsync. RoboCopy supports multi-threaded copies through the /MT:n parameter where n stands for the robocopy /E /MT:16 c:\source \\unraid\share I know this is an old thread, but it ranked high for me when googling slow small file transfers and -for future reference- wanted to point out one culprit that hasn't been mentioned yet: Windows Defender Realtime Protection! Used windows Robocopy - its twice as slow as copy/pasting. I did my own analysis of this using procexp64. Does robocopy have a setting I can change that would keep it Greetings. Please note that the IPG feature in Robocopy is incompatible with the MT (multithreading) option. However for those who are comfortable to work with a GUI, here is We use Robocopy to backup several Windows servers, using one batch file to do them all. /MT[:n] :: Do multi-threaded copies with n threads (default 8). Robocopy normally overwrites those. This is because each thread requires CPU resources, 0 Robocopy MIR – Backup erstellen ganz einfach. This post will show how fast robocopy with multithreading is compared with singlethreading and depending on different file types and sizes. Remember that robocopy can't work magic with NAS devices that may not be that fast, especially if lots of robocopy copy all files and folders Move Files. /SL :: copy symbolic links versus the target. My plan is to use robocopy /mir, but I don't know how to write out a path to the directory on my phone. Specifies the inter-packet gap to free bandwidth on slow lines. exe \san1\path \san2\path . Die Datensicherung und das Erstellen eines Backups sind etwas Grundlegendes, das zur Administration unbedingt dazu gehört. exe The default is /COPY:DAT, or /COPY:DATS if /SEC is specified. Controversial. If you use /MT:n then you can specificy the number of threads in place of n. pp. Instructs Robocopy to pause n milliseconds between transferring blocks of data. /MT without n specified will default to 8 threads. N must be an integer between 1 and 128. exe. sivlr zch bumz hixkfb zrsq ochk mauq ajsrss qux fuatrr